/Engine/Source/Runtime/Landscape/Classes/LandscapeProxy.h
Create a thumbnail material for a given layer
static [ULandscapeMaterialInstanceConstant](API\Runtime\Landscape\ULandscapeMaterialInstanceConsta-) * GetLayerThumbnailMIC ( [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * LandscapeMaterial, [FName](API\Runtime\Core\UObject\FName) LayerName, [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * ThumbnailWeightmap, [UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * ThumbnailHeightmap, [ALandscapeProxy](API\Runtime\Landscape\ALandscapeProxy) * Proxy )